【作者】 叶新福； 蒋家焕； 卢礼斌； 何琴；

【Author】 Ye Xinfu;Jiang Jiahuang;Lu libin;He Qin Rice & Wheat Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019

【机构】 福建省农业科学院稻麦研究所；

【摘要】 通过对几个大穗型杂优组合的穗部性状分析研究结果表明:一次枝梗数/二次枝梗数比例高的大穗型组合易形成高产。其原因主要在于一次枝梗着粒的千粒重高于二次枝梗着粒的千粒重,一次枝梗着粒的结实率高于二次枝梗着粒的结实率;并且其库源关系协调,粒/叶、实粒/叶、实粒重/叶均较高。提出以选育穗长较长、一次枝梗发达、着粒密度较稀的大穗组合来实现高产的育种策略。更多还原

【Abstract】 Three new large-panicle type hybrid rice combinations Teyou70,Gang501, Teyou124 were usedto study the large-panicle character and its influence on other yield characters. Results showed that the yieldof the large panicle combination was higher when the combination’s rate of primary branches and secondarybranches was higher. Because the setting percentage and 1000-grain weight in the spilekets on primarybranches are higher than those on secondary branches, and its grain sink was coordinated to source with morespilekets. more setting spikelets and more setting spileketes weight per unit leaf area. Additionally, it waspointed that it would be easier to get higher yield rice combination by selecting the characters of longerpanicle length,more primary branches and lower grain density.更多还原